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Keep getting error msg "Sending of username did not succeed. Mail server mail.comcast.net responded: [AUTH] Authentication failed."

AWagner
AWagner
more options

Out of the blue, I am getting error msg every time I open Thunderbird: 

          Sending of username did not succeed. Mail server mail.comcast.net responded: [AUTH] Authentication failed.

When I click on OK, I get another message:

Login Failed Login to server mail.comcast.net failed. Enter New Password Cancel Retry

I've tried resetting my password but it hasn't helped. I am NOT computer savvy, so please make any suggested fixes as simple as possible. Many thanks!

Out of the blue, I am getting error msg every time I open Thunderbird: Sending of username did not succeed. Mail server mail.comcast.net responded: [AUTH] Authentication failed. When I click on OK, I get another message: Login Failed Login to server mail.comcast.net failed. Enter New Password Cancel Retry I've tried resetting my password but it hasn't helped. I am NOT computer savvy, so please make any suggested fixes as simple as possible. Many thanks!

Alla svar (6)

user01229325
user01229325
more options

Go to the Help Menu in Thunderbird. Click Troubleshooting Information. Click Copy to Clipboard Come back here and paste that info into a reply window.

If it errors out as too much info, delete the font and printer info. It is not needed for this issue anyway.

AWagner
AWagner Frågans ägare
more options

Application Basics 

   Name: Thunderbird
   Version: 52.4.0
   User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:52.0) Gecko/20100101 Thunderbird/52.4.0
   Profile Folder: Show in Finder
   Application Build ID: 20171004092449
   Enabled Plugins: about:plugins
   Build Configuration: about:buildconfig
   Memory Use: about:memory
   Profiles: about:profiles

 Mail and News Accounts
   account1:
     INCOMING: account1, , (none) Local Folders, plain, passwordCleartext

   account2:
     INCOMING: account2, , (pop3) mail.comcast.net:110, plain, passwordCleartext
     OUTGOING: , smtp.comcast.net:587, plain, passwordCleartext, true

   account3:
     INCOMING: account3, , (imap) imap.googlemail.com:993, SSL, passwordCleartext
     OUTGOING: , smtp.googlemail.com:465, SSL, passwordCleartext, true

   account4:
     INCOMING: account4, , (pop3) mail.comcast.net:995, SSL, passwordCleartext
     OUTGOING: , smtp.comcast.net:587, alwaysSTARTTLS, passwordCleartext, true

 Crash Reports
   https://crash-stats.mozilla.com/report/index/bp-35408fe4-95df-4f60-952a-df80c2170306 (3/6/17)
   https://crash-stats.mozilla.com/report/index/bp-2d253d6a-9c53-4a64-8d29-c19862150923 (9/23/15)
   https://crash-stats.mozilla.com/report/index/bp-4536204a-be86-4e45-99e0-72e442140512 (5/12/14)
   https://crash-stats.mozilla.com/report/index/bp-1eb2b8e4-ca80-4c0b-8677-b41372140320 (3/20/14)
   https://crash-stats.mozilla.com/report/index/bp-a554a3a1-1ec9-4341-805b-05de22130704 (7/3/13)

 Extensions
   Lightning, 5.4.4, true, {e2fda1a4-762b-4020-b5ad-a41df1933103}

 Important Modified Preferences

   Name: Value

     accessibility.typeaheadfind.flashBar: 0
     browser.cache.disk.capacity: 358400
     browser.cache.disk.filesystem_reported: 1
     browser.cache.disk.smart_size_cached_value: 358400
     browser.cache.disk.smart_size.first_run: false
     browser.cache.disk.smart_size.use_old_max: false
     extensions.lastAppVersion: 52.4.0
     font.internaluseonly.changed: true
     mail.openMessageBehavior.version: 1
     mail.spotlight.firstRunDone: true
     mailnews.database.global.datastore.id: ebe1589e-4c90-a148-aa38-1d55726823e
     mailnews.database.global.views.conversation.columns: {"threadCol":{"visible":true,"ordinal":"1"},"flaggedCol":{"visible":true,"ordinal":"21"},"attachmentCol":{"visible":fals…
     mailnews.database.global.views.global.columns: {"threadCol":{"visible":true,"ordinal":"1"},"flaggedCol":{"visible":true,"ordinal":"21"},"attachmentCol":{"visible":fals…
     media.gmp.storage.version.observed: 1
     network.cookie.cookieBehavior: 3
     network.cookie.lifetimePolicy: 1
     network.cookie.prefsMigrated: true
     network.predictor.cleaned-up: true
     places.database.lastMaintenance: 1511890052
     places.history.expiration.transient_current_max_pages: 56812
     plugin.disable_full_page_plugin_for_types: video/x-ms-wmv
     plugin.importedState: true
     print.macosx.pagesetup: PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz4KPCFET0NUWVBFIHBsaXN0IFBVQkxJQyAiLS8vQXBwbGUgQ29tcHV0ZXIvL0RURCBQTElT…
     print.macosx.pagesetup-2: PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz4KPCFET0NUWVBFIHBsaXN0IFBVQkxJQyAiLS8vQXBwbGUvL0RURCBQTElTVCAxLjAvL0VO…
     print.print_bgcolor: false
     print.print_bgimages: false
     print.print_command:
     print.print_downloadfonts: true
     print.print_evenpages: true
     print.print_in_color: true
     print.print_margin_bottom: 0.5
     print.print_margin_left: 0.5
     print.print_margin_right: 0.5
     print.print_margin_top: 0.5
     print.print_oddpages: true
     print.print_orientation: 0
     print.print_pagedelay: 500
     print.print_paper_data: 0
     print.print_paper_height: 11.00
     print.print_paper_size: 6619250
     print.print_paper_size_type: 1
     print.print_paper_size_unit: 0
     print.print_paper_width: 8.50
     print.print_printer:
     print.print_reversed: false
     print.print_scaling: 1.00
     print.print_shrink_to_fit: true
     print.print_to_file: false
     print.print_unwriteable_margin_bottom: 56
     print.print_unwriteable_margin_left: 25
     print.print_unwriteable_margin_right: 25
     print.print_unwriteable_margin_top: 25
     privacy.donottrackheader.enabled: true
     security.sandbox.content.tempDirSuffix: {ac4515f1-4163-ae4d-8a57-feed2400d6f2}

 Graphics

     GPU #1
     Vendor ID: 0x10de
     Device ID: 0x0fea

     Features
     WebGL Renderer: NVIDIA Corporation -- NVIDIA GeForce GT 755M OpenGL Engine -- 2.1 NVIDIA-10.10.14 310.42.25f02

     AzureCanvasBackend: skia
     AzureCanvasAccelerated: 0
     AzureFallbackCanvasBackend: none
     AzureContentBackend: skia
     TileHeight: 1024
     TileWidth: 1024

 JavaScript

 Incremental GC: 1

 Accessibility

   Activated: 0
   Prevent Accessibility: 0

 Library Versions

     Expected minimum version
     Version in use

     NSPR
     4.13.1
     4.13.1

     NSS
     3.28.6
     3.28.6

     NSS Util
     3.28.6
     3.28.6

     NSS SSL
     3.28.6
     3.28.6

     NSS S/MIME
     3.28.6
     3.28.6
user01229325
user01229325
more options

It is your account #2 as listed in your Troubleshooting Info. You are using the unsecure port of 110 and no Authentication just like the error message states.

Change those server settings to: Port 995 - SSL/TLS - Normal Password for the POP server Port 465 - SSL/TLS - Normal Password for the SMTP server

To do this right click the account in the Folder Pane on the left side and select Settings. The POP settings are in Server Settings. To change the SMTP settings go to the very bottom of the list in the Settings screen and click Outgoing Server (SMTP) Select the incorrect account and select Edit

AWagner
AWagner Frågans ägare
more options

Thank you so much for the timely replies. Unfortunately, making those settings changes (see images) didn't fix it. I'm still getting error messages. Here's the current troubleshooting information (after I made the changes): 


 Application Basics

   Name: Thunderbird
   Version: 52.4.0
   User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:52.0) Gecko/20100101 Thunderbird/52.4.0
   Profile Folder: Show in Finder
   Application Build ID: 20171004092449
   Enabled Plugins: about:plugins
   Build Configuration: about:buildconfig
   Memory Use: about:memory
   Profiles: about:profiles

 Mail and News Accounts
   account1:
     INCOMING: account1, , (none) Local Folders, plain, passwordCleartext

   account2:
     INCOMING: account2, , (pop3) mail.comcast.net:995, SSL, passwordCleartext
     OUTGOING: , smtp.comcast.net:465, SSL, passwordCleartext, true

   account3:
     INCOMING: account3, , (imap) imap.googlemail.com:993, SSL, passwordCleartext
     OUTGOING: , smtp.googlemail.com:465, SSL, passwordCleartext, true

   account4:
     INCOMING: account4, , (pop3) mail.comcast.net:995, SSL, passwordCleartext
     OUTGOING: , smtp.comcast.net:465, SSL, passwordCleartext, true

 Crash Reports
   https://crash-stats.mozilla.com/report/index/bp-35408fe4-95df-4f60-952a-df80c2170306 (3/6/17)
   https://crash-stats.mozilla.com/report/index/bp-2d253d6a-9c53-4a64-8d29-c19862150923 (9/23/15)
   https://crash-stats.mozilla.com/report/index/bp-4536204a-be86-4e45-99e0-72e442140512 (5/12/14)
   https://crash-stats.mozilla.com/report/index/bp-1eb2b8e4-ca80-4c0b-8677-b41372140320 (3/20/14)
   https://crash-stats.mozilla.com/report/index/bp-a554a3a1-1ec9-4341-805b-05de22130704 (7/3/13)

 Extensions
   Lightning, 5.4.4, true, {e2fda1a4-762b-4020-b5ad-a41df1933103}

 Important Modified Preferences

   Name: Value

     accessibility.typeaheadfind.flashBar: 0
     browser.cache.disk.capacity: 358400
     browser.cache.disk.filesystem_reported: 1
     browser.cache.disk.smart_size_cached_value: 358400
     browser.cache.disk.smart_size.first_run: false
     browser.cache.disk.smart_size.use_old_max: false
     extensions.lastAppVersion: 52.4.0
     font.internaluseonly.changed: true
     mail.openMessageBehavior.version: 1
     mail.spotlight.firstRunDone: true
     mailnews.database.global.datastore.id: ebe1589e-4c90-a148-aa38-1d55726823e
     mailnews.database.global.views.conversation.columns: {"threadCol":{"visible":true,"ordinal":"1"},"flaggedCol":{"visible":true,"ordinal":"21"},"attachmentCol":{"visible":fals…
     mailnews.database.global.views.global.columns: {"threadCol":{"visible":true,"ordinal":"1"},"flaggedCol":{"visible":true,"ordinal":"21"},"attachmentCol":{"visible":fals…
     media.gmp.storage.version.observed: 1
     network.cookie.cookieBehavior: 3
     network.cookie.lifetimePolicy: 1
     network.cookie.prefsMigrated: true
     network.predictor.cleaned-up: true
     places.database.lastMaintenance: 1511890052
     places.history.expiration.transient_current_max_pages: 56812
     plugin.disable_full_page_plugin_for_types: video/x-ms-wmv
     plugin.importedState: true
     print.macosx.pagesetup: PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz4KPCFET0NUWVBFIHBsaXN0IFBVQkxJQyAiLS8vQXBwbGUgQ29tcHV0ZXIvL0RURCBQTElT…
     print.macosx.pagesetup-2: PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz4KPCFET0NUWVBFIHBsaXN0IFBVQkxJQyAiLS8vQXBwbGUvL0RURCBQTElTVCAxLjAvL0VO…
     print.print_bgcolor: false
     print.print_bgimages: false
     print.print_command:
     print.print_downloadfonts: true
     print.print_evenpages: true
     print.print_in_color: true
     print.print_margin_bottom: 0.5
     print.print_margin_left: 0.5
     print.print_margin_right: 0.5
     print.print_margin_top: 0.5
     print.print_oddpages: true
     print.print_orientation: 0
     print.print_pagedelay: 500
     print.print_paper_data: 0
     print.print_paper_height: 11.00
     print.print_paper_size: 6619250
     print.print_paper_size_type: 1
     print.print_paper_size_unit: 0
     print.print_paper_width: 8.50
     print.print_printer:
     print.print_reversed: false
     print.print_scaling: 1.00
     print.print_shrink_to_fit: true
     print.print_to_file: false
     print.print_unwriteable_margin_bottom: 56
     print.print_unwriteable_margin_left: 25
     print.print_unwriteable_margin_right: 25
     print.print_unwriteable_margin_top: 25
     privacy.donottrackheader.enabled: true
     security.sandbox.content.tempDirSuffix: {ac4515f1-4163-ae4d-8a57-feed2400d6f2}

 Graphics

     GPU #1
     Vendor ID: 0x10de
     Device ID: 0x0fea

     Features
     WebGL Renderer: NVIDIA Corporation -- NVIDIA GeForce GT 755M OpenGL Engine -- 2.1 NVIDIA-10.10.14 310.42.25f02

     AzureCanvasBackend: skia
     AzureCanvasAccelerated: 0
     AzureFallbackCanvasBackend: none
     AzureContentBackend: skia
     TileHeight: 1024
     TileWidth: 1024

 JavaScript

 Incremental GC: 1

 Accessibility

   Activated: 0
   Prevent Accessibility: 0

 Library Versions

     Expected minimum version
     Version in use

     NSPR
     4.13.1
     4.13.1

     NSS
     3.28.6
     3.28.6

     NSS Util
     3.28.6
     3.28.6

     NSS SSL
     3.28.6
     3.28.6

     NSS S/MIME
     3.28.6
     3.28.6
AWagner
AWagner Frågans ägare
more options

Please ignore the "see images" above.

user01229325
user01229325
more options

You could try switching your SMTP settings back to the way account 4 was in your original info. Here is the Comcast page for their settings and they say use 587 as first choice. I use 465 with no issues. https://www.xfinity.com/support/internet/email-client-programs-with-xfinity-email/